Thread: prime problem
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Old 2004-05-04, 13:11   #4
jinydu's Avatar
Dec 2003
Hopefully Near M48

175810 Posts

So you're looking for values of n such that 1997n-1 and 1997n+1 are prime.

The smallest such value of n is 54.

Hint: n must be divisible by 6.
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